Napkin holder



FIG. 1 is a front elevational view of a napkin holder showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a perspective view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken-line disclosure of elements in the views is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a napkin holder, as shown and described. 